Why is drainage control sometimes an effective method of landslide control?
A)it reduces the amount of water in the hillslope materials
B)it reduces the growth of vegetation
C)it reduces the thickness of the slide mass
D)it reduces the permeability of the rocks

Question

Quizplus · Accepted Answer

Drainage control helps to reduce the amount of water in the hillslope materials, which can decrease the pore water pressure within the soil and reduce the weight of the soil. This can make the slope more stable and less prone to landslides.

Why Is Drainage Control Sometimes an Effective Method of Landslide